Smoke-stack.



No.'816,05 1 I PATENTED MARQZV, 1906. W. G. WALLAOB.'

SMOKE STACK. APBLIO A TION FILED NOV.l8, 1904.

INVENTOR LACE, a citizen of the United UNITED STATES PATENT orrron SMOKE-STACK.

Application filed November 18,1904. Serial No. 233,862.

Specification of Letters Patent.

- Patented March 27,1906.

To all" whont it may concern:

Be it known that I, WILLIAM GIBsoN WAL- States, residing at, Proctorknott, in the county of St. Louis and State of Minnesota, have invented certam new and useful Improvements in Smokespark netting thereby Stacks, of which the following is a' specification.

My invention relates to. improvements in smoke stacks'and its object is toprovide a stack having in addition to theusual main opening, for the passage of exhaust steam from cylinders smoke, gases etc., anindependent opening through which steam or air may be freely exhausted at any time, with comparatively little noise and without affectin the draft in the main opening.

'le my improvements may be applied to smoke stacks of any general description they are particularly applicable to stacks designed for useon locomotives and I have illustrated such application of my improvements in the accompanying drawings in which s Figure 1 is a longitudinal verticalsection through a locomotive stack embodying my invention, and

Figure 2 is a plan view of the same, partly in section, the plane of section being indicated by the line (2) of Fig. 1.'

In locomotives as heretofore constructed 'it has been the practice to lead the exhaust pipes'from the air pumps or steam turbines 1nto the smoke box, in such a manner as to direct the exhaust therefrom directly through the stack. Such construction tends to produce an undesirable draft on the fire, especially when the locomotive is at rest or drifting, thereby causing an increase of coal consumption and a wasteful generation'of steam in the boiler.

Furthermore such an arrangementof pipes makes it exceedingly difficult to gain access to them for the purposes of repairs, and adjustment and tends to interfere with the adjustment of theother smoke box appliances. It also necessitates the making of holes in the increasing the liability the locomotive to emit sparks. In order to overcome these objectionable features I provide a stack of any referred construction, having a main centra opening 3 extendinglfro'm the base to the top, through which the exhaust steam from the cylinders and smoke and gases from the furnace pass in the usual manner. Surrounding said opening at or near its top is a small chamber 4,

provided with a series of upwardly opening exhaust ports 5, and a passage 6., extends downwardly therefrom, alongside the main opening tov a point near the base of the stack, where it may be readily connected to the exhaust pipes leading from theair pumps or steam turbines.

The exhaust ports shouldbe of sufficient capacity to prevent material back pressure.

From the foregoing it will beseen that in a stack constructed in accordance with my invention the noise caused by the exhaust from the pumps or turbines will be reduced to a minimum, by reason of the chamber 4, and openings 5; and also by reason of the location and direction of said openings such exhaust-will in nowise affect the draft in the main opening 3. The chamber 4, also serves to prevent condensed steam, oil, or dirty wa- .ter being thrown from the stack when thev pumps are started.

The location of the end of the passage 6, at a point near the base of the stack and outside of the smoke box, permits of a ready connection to the exhaust pipes as above described and obviates the liability of the pipes leaking or getting out of line with the stack,

1n locomotive construction it has been .found by actual experience that it is highly I desirable to have the exhaust steam, smoke,

gases',-etc., emitted by the various parts of the apparatus, discharged into the atmos-' phere at one point t. e. the top of the smoke stack as such a construction in addition to addinggreatly to the appearance of the locomotive permits the waste products accompanying the exhausts to be freely discharged in such a manner that they will becarried away by the blast from the stack when the I locomotive engines are inaction, and will not settle upon the locomotive and accompanying cars.

' In order to accomplish such a result it w1ll be noted that applicant has embodied ina single structure two independent means for conveying the different exhausts, which would have a deleterious influence upon each other, to the top of the stack from which they can be discharged into the atmosphere in the most efficacious manner. In other words he provides a combination stack capable of handling two exhausts independently.

vIt will also be noted that applicant's-device conforms in appearance very closely to the present standard form of stack, which owing to its being constructed of a light material is provided with a strengthening bead around its upper edge. In applicants device advantage is taken of this bead in order to form the chamber 4, previously referred to.

Having thus described my invention and illustrated its use, what I claim as new and useful, and desire to secure by Letters Patent, is the following: I

1.A locomotive stackprovided at its top with a chamber surrounding and lying wholly Without the main passage of the stack, and with a vertical passage having an inlet near the base of the stack adapted to receive the exhaust from auxiliary motors and communicating at its upper end with said chamber, said chamber being provided with upwardly directed outlet means extending around its circumference.

2.Alocomotive stack provided at its top with a chamber surrounding and lying wholly without the main passage of the stack and with a vertical passage having an inlet near the base of the stack adapted to receive the exhaust from auxiliary motors, and communicating at its upper end with said chamber, such parts being integrally formed, and the chamber being provided with outlet openings directed so that the draft from said chamber will not in any substantial degree augment that from the stack.

In testimony whereof I have hereunder signed my name in the presence of the two subscribed witnesses.

WILLIAM GIBSON WALLACE.

Witnesses:

A. A. BEOHTELL, D. A. KLUMPI-r. 

